Computerworld: On Tuesday morning, Gmail users began posting Twitter messages complaining about a Gmail outage. The service disruption lasted about an hour before Google said that it had fixed the problem. Initially, Google said the problem affected "less than 2 percent" of its 350 million Gmail users, but it has since amended that number to "less than 10 percent."
In addition, Google notified users that "While we have resolved this issue with Google Mail, it's possible that some users may experience message delays because affected accounts weren't available to receive messages. The messages will be successfully delivered after account access is restored."